package SDLx::Controller;
use strict;
use warnings;
use Carp;
use Time::HiRes;
use SDL;
use SDL::Event;
use SDL::Events;
use SDL::Video;
use SDLx::Controller::Interface;
use SDLx::Controller::State;
use Scalar::Util 'refaddr';
our $VERSION = 2.548;
# inside out, so this can work as the superclass of another
# SDL::Surface subclass
my %_dt;
my %_min_t;
my %_current_time;
my %_stop;
my %_event;
my %_event_handlers;
my %_move_handlers;
my %_show_handlers;
my %_sleep_cycle;
my %_eoq;
my %_paused;
sub new {
my ($self, %args) = @_;
if(ref $self) {
bless $self, ref $self;
}
else {
my $a;
$self = bless \$a, $self;
}
my $ref = refaddr $self;
$_dt{ $ref } = defined $args{dt} ? $args{dt} : 0.1;
$_min_t{ $ref } = defined $args{min_t} ? $args{min_t} : 1 / 60;
# $_current_time{ $ref } = $args{current_time} || 0; #no point
$_stop{ $ref } = $args{stop};
$_event{ $ref } = $args{event} || SDL::Event->new();
$_event_handlers{ $ref } = $args{event_handlers} || [];
$_move_handlers{ $ref } = $args{move_handlers} || [];
$_show_handlers{ $ref } = $args{show_handlers} || [];
$_sleep_cycle{ $ref } = $args{delay};
$_eoq{$ref} = $args{exit_on_quit} || $args{eoq} || 0;
# $_paused{ $ref } = $args{paused}; #read only
return $self;
}
sub delay {
my $self = shift;
my $delay = shift;
my $ref = refaddr $self;
$_sleep_cycle{ $ref } = $delay if $delay;
return $self;
}
sub DESTROY {
my $self = shift;
my $ref = refaddr $self;
delete $_dt{ $ref};
delete $_min_t{ $ref};
delete $_current_time{ $ref};
delete $_stop{ $ref};
delete $_event{ $ref};
delete $_event_handlers{ $ref};
delete $_move_handlers{ $ref};
delete $_show_handlers{ $ref};
delete $_sleep_cycle { $ref };
delete $_eoq{$ref};
delete $_paused{$ref};
}
sub run {
my ($self) = @_;
my $ref = refaddr $self;
my $dt = $_dt{ $ref };
my $min_t = $_min_t{ $ref };
my $t = 0.0;
#Allows us to do stop and run
$_stop{ $ref } = 0;
$_current_time{ $ref } = Time::HiRes::time;
while ( !$_stop{ $ref } ) {
$self->_event($ref);
my $new_time = Time::HiRes::time;
my $delta_time = $new_time - $_current_time{ $ref };
next if $delta_time < $min_t;
$_current_time{ $ref} = $new_time;
my $delta_copy = $delta_time;
while ( $delta_copy > $dt ) {
$self->_move( $ref, 1, $t ); #a full move
$delta_copy -= $dt;
$t += $dt;
}
my $step = $delta_copy / $dt;
$self->_move( $ref, $step, $t ); #a partial move
$t += $dt * $step;
$self->_show( $ref, $delta_time );
$dt = $_dt{ $ref}; #these can change
$min_t = $_min_t{ $ref}; #during the cycle
SDL::delay( $_sleep_cycle{ $ref } ) if $_sleep_cycle{ $ref };
}
}
sub exit_on_quit {
my ($self, $value) = @_;
my $ref = refaddr $self;
if (defined $value) {
$_eoq{$ref} = $value;
}
return $_eoq{$ref};
}
*eoq = \&exit_on_quit; # alias
sub pause {
my ($self, $callback) = @_;
my $ref = refaddr $self;
$callback ||= sub {1};
my $event = SDL::Event->new();
$_paused{ $ref} = 1;
while(1) {
SDL::Events::wait_event($event) or Carp::confess("pause failed waiting for an event");
if($callback->($event, $self)) {
$_current_time{ $ref} = Time::HiRes::time; #so run doesn't catch up with the time paused
last;
}
}
delete $_paused{ $ref};
}
sub _event {
my ($self, $ref) = @_;
while ( SDL::Events::poll_event( $_event{ $ref} ) ) {
$self->_exit_on_quit( $_event{ $ref} ) if $_eoq{$ref};
foreach my $event_handler ( @{ $_event_handlers{ $ref} } ) {
next unless $event_handler;
$event_handler->( $_event{ $ref}, $self );
}
}
}
sub _move {
my ($self, $ref, $move_portion, $t) = @_;
foreach my $move_handler ( @{ $_move_handlers{ $ref} } ) {
next unless $move_handler;
$move_handler->( $move_portion, $self, $t );
}
}
sub _show {
my ($self, $ref, $delta_ticks) = @_;
foreach my $show_handler ( @{ $_show_handlers{ $ref} } ) {
next unless $show_handler;
$show_handler->( $delta_ticks, $self );
}
}
sub stop { $_stop{ refaddr $_[0] } = 1 }
sub _add_handler {
my ( $arr_ref, $handler ) = @_;
push @{$arr_ref}, $handler;
return $#{$arr_ref};
}
sub add_move_handler {
my $ref = refaddr $_[0];
return _add_handler( $_move_handlers{ $ref}, $_[1] );
}
sub add_event_handler {
my $ref = refaddr $_[0];
Carp::confess 'SDLx::App or a Display (SDL::Video::get_video_mode) must be made'
unless SDL::Video::get_video_surface();
return _add_handler( $_event_handlers{ $ref}, $_[1] );
}
sub add_show_handler {
my $ref = refaddr $_[0];
return _add_handler( $_show_handlers{ $ref}, $_[1] );
}
sub _remove_handler {
my ( $arr_ref, $id ) = @_;
if ( ref $id ) {
($id) = grep {
$id eq $arr_ref->[$_]
} 0..$#{$arr_ref};
if ( !defined $id ) {
Carp::cluck("$id is not currently a handler of this type");
return;
}
}
elsif(!defined $arr_ref->[$id]) {
Carp::cluck("$id is not currently a handler of this type");
return;
}
return delete( $arr_ref->[$id] );
}
sub remove_move_handler {
return _remove_handler( $_move_handlers{ refaddr $_[0] }, $_[1] );
}
sub remove_event_handler {
return _remove_handler( $_event_handlers{ refaddr $_[0] }, $_[1] );
}
sub remove_show_handler {
return _remove_handler( $_show_handlers{ refaddr $_[0] }, $_[1] );
}
sub remove_all_handlers {
$_[0]->remove_all_move_handlers;
$_[0]->remove_all_event_handlers;
$_[0]->remove_all_show_handlers;
}
sub remove_all_move_handlers {
$_move_handlers{ refaddr $_[0] } = [];
}
sub remove_all_event_handlers {
$_event_handlers{ refaddr $_[0] } = [];
}
sub remove_all_show_handlers {
$_show_handlers{ refaddr $_[0] } = [];
}
sub move_handlers { $_move_handlers{ refaddr $_[0] } }
sub event_handlers { $_event_handlers{ refaddr $_[0] } }
sub show_handlers { $_show_handlers{ refaddr $_[0] } }
sub dt {
my ($self, $arg) = @_;
my $ref = refaddr $self;
$_dt{ $ref} = $arg if defined $arg;
$_dt{ $ref};
}
sub min_t {
my ($self, $arg) = @_;
my $ref = refaddr $self;
$_min_t{ $ref} = $arg if defined $arg;
$_min_t{ $ref};
}
sub current_time {
my ($self, $arg) = @_;
my $ref = refaddr $self;
$_current_time{ $ref} = $arg if defined $arg;
$_current_time{ $ref};
}
sub paused {
$_paused{ refaddr $_[0]};
}
sub _exit_on_quit {
my ($self, $event) = @_;
$self->stop() if $event->type == SDL_QUIT;
}
1;
__END__